A Billings man has been sentenced to more than three years in federal prison for robbing a South Side casino in April 2017.

U.S. District Judge Susan Watters also sentenced Christopher Richard Mundt, 28, to three years of supervised release for robbery affecting commerce.

He admitted to the charge in June without a plea agreement. He must also pay $400 in restitution to the casino.

On April 25, 2017, Mundt entered the Powder Horn Casino wearing a hoodie and gloves and approached the cashier, handing her a piece of paper on which he had written, "Cash, now!! Gun!! Calm!!" according to court documents.

The cashier told investigators Mundt had pointed to his waistband, then to the word "gun" on the piece of paper, apparently indicating he was armed.

Mundt faced up to 20 years in prison for the robbery charge.

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Both Mundt's attorney and federal prosecutor Lori Suek recommended a sentence at the low end of the federal guidelines on Thursday, noting that he had mental health problems that had contributed to his actions.

"He suffers from mental illness that, when treated, make him the individual he has been in court," Suek told the judge.

Both lawyers said he was unlikely to reoffend if he continues to take his medication and seek mental health treatment.

"I need to be there for my family like they are for me," Mundt told the judge before the sentence was pronounced.

Mundt remained in custody after Thursday's sentencing hearing.

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